Programa Poseidon is marine biodiversity citizen science project delivered by ECOAQUA Institute, University Las Palmas de Gran Canaria (ECOAQUA), supported by Fundacion Biodiversidad (2014-2015). In 2014 is established web platform, where target groups as scuba divers, whale watchers, environmentalist, etc. could introduce photo, location and other information on observed marine species. In the period of two years were registered more than 7000 observations by more than 400 users. All the reported observations where validated by ECOAQUA Ichthyology experts team, and finally encoded applying EU-nomen or WORMS classification.